WPML duplicate_master_post - 0.02

function duplicate_master_post($post_id, $post, $update){
    global $sitepress, $iclTranslationManagement;

    $only_cpt   = array();
    $only_cpt[] = 'book';

    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
        return;
    }
    // don't save for revisions
    if ( isset( $post->post_type ) && $post->post_type == 'revision' ) {
        return;
    }
    // only duplicate when publishing
    if ($post->post_status != 'publish') {
        return;
    }
    // avoid recursion
    remove_action('wp_insert_post', 'duplicate_master_post', 10);

    if ( !isset( $iclTranslationManagement ) ) {
        $iclTranslationManagement = new TranslationManagement;
    }

    $post_type = get_post_type( $post_id );
    if ( $sitepress->is_translated_post_type( $post_type ) && in_array( $post_type, $only_cpt ) ) {
        $iclTranslationManagement->make_duplicates_all( $post_id );
    }
}
add_action('wp_insert_post', 'duplicate_master_post', 10, 3);